Armed Forces 437 Military art and science 162 Defenses 137 Periodicals 111 Military policy 109 Veterans 97 Aeronautics, Military 92 more ... Appropriations and expenditures 90 National security 84 Military readiness 80 Procurement 76 History 74 Military research 63 Research 60 World politics 53 Defense contracts 51 Management 50 Strategy 46 Military education 42 Air power 39 Civil defense 36 Supplies and stores 35 Soldiers 34 Medical care 33 Expenditures, Public 32 Safety measures 30 Weapons systems 30 Foreign relations 29 History, Military 29 Air warfare 28 less ...